Installation manual

44
3.14 Problems, causes and solutions.
The burner ignites and then blocks
(code 1 on the
display)
The burner doesn’t ignite
The boiler doesn’t reach temperature
Heating is not sufficient
The boiler does not produce DHW
DHW is not enough
DHW is not hot enough
Error code 5 or 6 on display
Error code 10 on display
Error code 2 on display
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1
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Detection electrode not connected or badly positioned, flawed
ceramics
2
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Detection cable is interrupted 3
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The burner control unit is defective 4
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The printed control board is probably defective 5
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Gas does not reach the burner 6
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The burner is dirty 7
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The gas is not compatible with the boiler (only natural gas
G20)
8
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The pump is blocked 9
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The CH safety water pressure switch is interrupted or gives a
wrong signal
10
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The gas valve is defective 11
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The room thermostat is defective 12
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The safety thermostat or the safety water pressure switch or
limit thermostat is on
13
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14
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The C.H. sensor is interrupted (5) 15
The heat exchanger is dirty 16
The holes on the burner are obstructed 17
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The boiler is underdimensioned 18
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The D.H.W. sensor is interrupted 19
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The heat exchanger is obstructed with calcium 20
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The filter of the cocks are dirty 21
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The burner gas input is not sufficient 22
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The boiler output is lower than the requirements
23
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•
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Table 9
Problems
Cause
Solutions